Cap Ex calculation on 100+ year old properties

[Mary Jay]

Hi guys,

Those who have 100 year old properties, how do you calculate cap ex on them?

Do you say: ok, it will need a roof in 10 years, roof is 20K, so for the next 20K I will save $200 per month for the roof?

Then do you think foundation will go bad during the next 10-30 years?

May be siding?

May be windows need to be replaced?

It may be looking ok now but since its an older home it may be in a need of some major repairs soon? So how do you know what those repairs will be? Or may be you can list them, what you are predicting when you are buying a  100 year old property?

Thank you